Table 2. Ray-to-detector plane intersections for actual data in the AP view using RT. Using knowledge of the point source and the detector plane locations in Table 1, combined with the object positions in AP, LAT, VERT in this table, the location of the intersections can be calculated. In addition, the angle of the intersection in degrees is shown relative to the normal of the AP plane.
AP = Antero-Posterior; LAT = Lateral; VERT = Vertical; RT = Ray Tracing; AC = Anterior Commissure; PC = Posterior Commissure; Midline = Midline Structure on Falx; Target: Left STN = Target on Left Subthalamic Nucleus; 15mmAboveTarget: Left STN = 15 millimeters above target along stereotactic axis of left subthalamic nucleus; 75mmAboveTarget: Left STN = 75 millimeters above target along stereotactic axis of left subthalamic nucleus; RPPT = Right Posterior Pin Tip; RPPB = Right Posterior Pin Base; RPSS = Right Posterior Sphere Superior; RPSI = Right Posterior Sphere Inferior; RFPT = Right Frontal Pin Tip; RFPB = Right Frontal Pin Base; RFSS = Right Frontal Sphere Superior; RFSI = Right Frontal Sphere Inferior; LPPT = Left Posterior Pin Tip; LPPB = Left Posterior Pin Base; LPSS = Left Posterior Sphere Superior; LPSI = Left Posterior Sphere Inferior; LFSS = Left Frontal Sphere Superior; LFSI = Left Frontal Sphere Inferior; LFPT = Left Frontal Pin Tip; LFPB = Left Frontal Pin Base; Relecdelayed = Right Electrode Tip; Rscrew2 = Right Screw 2; RScrew1 = Right Screw 1.
| Object | Intersection | ||||||
| AP | LAT | VERT | AP | LAT | VERT | 90-angle of intersection | |
| AC | 8.7 | -0.8 | -11.2 | -515 | 4.645895 | -95.8959 | 9.205316 |
| PC | -18.8 | -0.4 | -11.6 | -515 | 4.84415 | -88.8589 | 8.869997 |
| Midline | 5.7 | -2.3 | 41.9 | -515 | 1.882975 | 0.794222 | 4.53697 |
| Target: Left STN | -8.65882 | -12.4276 | -15.7972 | -515 | -16.1984 | -99.0553 | 9.347044 |
| 15mmAboveTarget: Left STN | -2.35342 | -20.1082 | -4.56108 | -515 | -29.9709 | -80.8777 | 8.536699 |
| 75mmAboveTarget: Left STN | 22.86817 | -50.8308 | 40.38327 | -515 | -87.8171 | -4.52933 | 6.17375 |
| LFPB | 89.4 | -46.1 | -5.6 | -515 | -87.4943 | -111.338 | 10.64041 |
| LFPT | 74.6 | -30 | -4.1 | -515 | -52.9357 | -103.08 | 9.777465 |
| LFSI | 77.8 | -58 | -34.2 | -515 | -110.045 | -165.292 | 13.38359 |
| LFSS | 79.7 | -54.5 | -21.1 | -515 | -103.254 | -139.459 | 12.1474 |
| LPPB | -92.9 | -59.6 | -2.7 | -515 | -89.0831 | -56.856 | 8.311116 |
| LPPT | -75.5 | -45.9 | 0.5 | -515 | -69.0665 | -55.3047 | 7.827933 |
| LPSI | -84 | -65.3 | -30.9 | -515 | -99.1016 | -103.357 | 10.50932 |
| LPSS | -85 | -64.2 | -19.6 | -515 | -97.2366 | -85.207 | 9.694069 |
| RFPB | 87.8 | 49 | -4.5 | -515 | 109.2587 | -108.486 | 11.27558 |
| RFPT | 72.5 | 33.5 | -2.9 | -515 | 74.9944 | -99.9564 | 10.1855 |
| RFSI | 77.1 | 60.6 | -38.4 | -515 | 130.6156 | -173.496 | 14.41237 |
| RFSS | 79.3 | 56.7 | -19.7 | -515 | 123.2052 | -136.447 | 12.73938 |
| RPPB | -94.1 | 48.5 | -3.9 | -515 | 80.04919 | -58.4914 | 8.51973 |
| RPPT | -77 | 34.1 | -1 | -515 | 59.06 | -57.4 | 8.015313 |
| RPSI | -86.6 | 58.3 | -26.2 | -515 | 96.41347 | -95.2445 | 10.43098 |
| RPSS | -87.4 | 57.5 | -21.5 | -515 | 95.03917 | -87.6267 | 10.08335 |
| Relecdelayed | -8.7 | 12.3 | -16 | -515 | 27.44998 | -99.4014 | 9.504477 |
| Rscrew2 | 42.1 | 40 | 41.4 | -515 | 83.31683 | -5.65575 | 6.549156 |
| RScrew1 | 19.6 | 46.3 | 46.3 | -515 | 91.70808 | 6.884433 | 6.417344 |